Automatic finishing machine



E. W. PETERSON AUTOMATIC FINISHING MACHINE A ril 7, 1942.

Filed April 9, 1940 8 Sheets-Sheet 1 NTOR m ATTORN Y.

April 1942- v E. w. PETERS ON 2,278,584

AUTOMATIC FINISHING MACHINE Filed April 9, 1940 a Sheets-Sheet 2 lllll 'h ATT EYS April 7, 1942. E. w. PETERSON AUTOMATIC FINISHING MACHINE Filed April 9, 1940 8 Sheets-Sheet .5

INVENTOR Z 7 10 "(Peterson ATTO NEYS Filed April 9, 1940 8 Sheets-Sheet 4 INVENTOR Erin WPefsrson ATTO April 1942- E. w. PETERSON AUTOMATIC FINISHING MACHINE Filed April 9, 1940 8 Sheets-Sheet 5 INVENTOR E776 Wpezens'ong m ATTO NEYS Aprifl 7, 1942. E. w. PETERSON 2,278,584

AUTOMATIG FINISHING MACHINE Filed April 9, 1940 8 Sheets-Sheet 6 INVENTOR ATTO Y5 April7, 1942. E. w. PETERSON AUTOMATIC FINISHING MACHINE Filed April 9, 1940 8 Sheets-Sheet 7 April 7 1942.

E. W. PETERSON AUTOMATIC FINISHING MACHINE Filed April 9, 1940 8 Shets-Sheet a INVENTOR I 71 6" "(Peterson ATTOR V vs Patented Apr. 7, 1942 An'rotmric rmrsnmc MACHINE Eric W. Peterson, Oak Park, Ill, assignor to Remington Arms Company, Inc, a corporation of Delaware Application April 9,

20 Claims.

This invention relates to a means for indexing a machine for operating upon a multiple surface piece of work so that each surface is indexed, the work is moved toward a tool after each surface has been operated upon, and a means is provided to stop the machine after each surface has been operated upon a predetermined number of times.

As a specific example of the invention, it is shown as applied to a. machine for grinding rotary tools such as milling cutters. It is necessary to frequently grind and to form tools for production machinery and these must be accurately made and ground, particularly for precision work. As a result, the expense of such is high, and it is desirable to reduce tool cost wherever possible. By this invention it is merely necessary to set the machine and start it, after which it will stop automatically upon the completion of the operation. The amount of material taken off at each operation can be regulated to suit the conditions and efiiciency of the operation.

In the drawings, the front of the machine is considered to be the part of the machine near the grinding wheel, and the right-hand part of the machine that adjacent to the solenoid H2.

In the drawings:

Fig. 1 is-a right-hand elevation of the assembled machine.

Fig. 2 is a rear elevation of the assembled machine (the cross feed solenoid not being shown).

Fig. 3 is a plan view of the right half of the machine.

Fi 4 is a plan view of the left portion of the machine, the line BB thereof being adjacent line BB of Fig. 3.

Fig. 5 is a fragmentary elevational end view of the indexing ratchet assembly.

Fig. 6 is a side view of Fig. 5.

Fig. '7 is a fragmentary plan View of the indexing' ratchet lock means.

Fig. 8 is an end view of Fig. 7, looking from the rear of the machine.

Fig. 9 is an end view of Fig. '7, looking in the.

N41), Serial No. 328,641

Fig. 14 is a fragmentary and detail view of the detent of the clutch release taken in the direction of I l-M of Fig. 11.

Fig. 15 is a fragmentary elevation of the feed index rack and operating pawls, this rack serving to govern the number of cuts to be taken and stopping the machine after the desired cut.

Fig. 16 is an end elevation of Fig. 15.

Fig. 1'7 is a top planview of Fig. 15.

Fig. 18 is a fragmentary elevational detail of the ratchet for the horizontal feed.

Fig. 19 is a fragmentary view partially in section of the ratchet of Fig. 18.

Fig. 20 is a plan view of the detail of Fig. 18.

Fig. 21 is a detail View of an arbor which may be used on the machine to hold the work to be operated upon. v

Fig. 22 is a view of another type of work holder.

Numerous machines use rotary tools having teeth such as, for example, milling machine cutters, circular saws and other similar shapes. In this type of tool, there are a plurality of teeth or cutting edges of similar configuration. In the manufacture or sharpening of these,it is necessary that the faces all. be ground at the same angle and that they be evenly spaced in order to make an accurate tool. This may be accomplished in a number of Ways; however, if it be done by an automatic mechanical means, considerable time will be saved, and the cost of making the tools materially reduced, and, at the same time, a more accurate and suitable tool can be made, which is necessary in precise and accurate production tools. A similar problem also arises in the manufacture of other serrated disc objects such as gear teeth.

The machine in general uses a rotating abrasive wheel of the desired shape to cut the surface of the work to be operated upon. This wheel is rapidly rotated in accordance with the usual practice, and the work to be ground is held in a fixed-position in a suitable arbor. It is to be understood that other rotating and stationary cutting means may be employed. The arbor may be mounted rotatably upon a carriage which reciprocates in the direction of the wheel so that the rotating abrasive wheel will properly contact the surface of the work to be ground. The carriage also has a lateral adjustment so that the work may be moved progressively against the grinding wheel in order to produce the desired finished and sharpened face on the work. The work arbor is rotatably mounted on the carriage, and has a suitable index means which may be set so that, after the abrasive wheel has ground one tooth, the work will be rotated the proper amount to bring the next tooth in position for grinding. Upon the completion of grinding each of the faces or teeth or other serrations on the work, the carriage may be moved inwardly a predetermined amount so that another out can be taken off of each of the faces of the tools. The machine may be set so that as many cuts as desired may be made and the amount of metal removed each time may be varied by the operator, in accordance with that desired.

Describing the machine generally, is the base supporting a driving motor 3|, which may drive a suitable set of gears (not shown) contained in a casing 32 through a belt 33 and pulleys 34 and 35. Shaft 36 (Fig. 2) supports the gears within the casing 32. Pulley 31 and pulley 38, by means of belt 39, may be employed to drive a shaft 40 (Fig. 1) upon which is mounted a suitable grinding or finishing wheel 4|. It is to be understood that the shape of the grinding or finishing wheel may be selected so as to produce the desired cut upon the tool which is to be sharpened or finished, and that it need not necessarily be an abrasive Wheel. For the purposes of illustration, a hollow boring mill 42 is shown mounted in a work holder 43. Work holder 43 is rotatably supported by shaft 44, which is carried by the reciprocating carriage 45. The reciprocating carriage 45 reciprocates on portion 46 of the main frame of the machine, the grooves 41 (Fig. 2) serving to hold it in place and guide the reciprocation. The cross-feed carriage 48 is mounted upon the carriage 45 and may reciprocate in a lateral direction, and is held in place by the grooves 49 (Fig. 1). The rotary indexing ratchet wheel 50 is operatively connected to the shaft 44 and serves to turn the work 42 in a pre-determined manner, which will be described presently. Upon the completion of a complete revolution and thereby an operation on each of the faces of the work 42, a shaft 5| (Fig. 2) is indexed by means of the horizontal cross feed ratchet 52 (Figs. 2 and 18 to 20), so that the work is moved towards the finishing tool a pre-determined amount. The clutch handle 53 engages the gears contained within the case 32 with any suitable driving means for the reciprocating carriage 45 so as to cause the carriage 45 to reciprocate ina horizontal direction, bringing the work 42 in contact with the rotating finishing wheel 4|, such as is shown in Fig. 3. In Fig. 3 the tool is shown as it is just engaging the wheel 4|. A suitable switch 54 (Fig. 4) is also operated by the clutch handle 53, which serves to turn on the motor 3|, causing the operation of the parts before the gears and the reciprocating mechanism are engaged.

Work rotation indexing The rotary indexing means for the work will now be described in detail. The number of teeth or serrations which are to have a face ground will obviously govern the desired indexing thereof; for example, if there are four teeth or four faces such as 55 of hollow boring mill 42, the carriage must reciprocate four times and the work or boring mill will be turned to the correct four positions for the finishing wheel 4| to operate thereupon. The work 42 must also be held rigidly while the carriage is reciprocating and particularly while the work is in contact with finishing wheel 4| and being ground or finished. The rotary indexing wheel 50 (Figs. 2 and 5), containing a plurality of holes 56, is selected so that the proper number of teeth 51 and holes 56 are contained therein to give the correct angular movement to the work in conjunction with the operation of the ratchet, about to be described. It is evident that it will be necessary to have several of these Wheels made with the proper number of teeth and holes. A cam 58 is adjustably attached to the frame of the machine, as by adjusting bolt 60 located in the slot 59. The rotary indexing ratchet cam operator is pivoted at 6|, and carries a plate 62 having a segmental cam 63 thereon. The pivot 6| is attached to the cross feed carriage 48 in such a manner that it reciprocates therewith. As the reciprocating carriage 45 is returning toward the rear of the machine or to the right (Fig. 1), the roller 64 will contact the cam 58 and tend to rotate the plate 62 and its cam 62 in a countor-clockwise direction (Fig. 2). A bell crank 65 is pivoted at 66 upon the cross feed carriage 48 and has a roller 61 which will contact the cam 63, so that as the plate 62 is rotated, the bell crank 65 will be rotated in a clockwise direction (Fig. 2). A collar 69 (Fig. 5) is loosely rotatable upon the shaft 44. The collar 69 has a pawl 10 pivoted at 1| upon the arm 12 of the collar 69, and spring pressed by spring I05 into engagement with the teeth 51 of the indexing ratchet wheel 56. A connecting link 13 connects the pivot 14 of the bell crank 65 with the pivot point 15 attached to the collar 69, so that as the bell crank 65 is rotated in the clockwise direction the link 13 will be pulled in a counterclockwise direction, as shown in Fig. 5, and the pawl 10 in engagement with the ratchet indexing Wheel 50 will rotate the shaft 44 and with it the work 42. An indexing stop plate 16 (Figs. 2 and 5) is provided which in cooperation with the collar 69 will cause the movement of hell crank 65 to rotate the indexing ratchet wheel 56 the desired amount. The holes 11 may be threaded to receive a screw-threaded stop. This screwthreaded stop (not shown) is placed within any of the desired holes 11 and allowed to protrude through the stop plate 16. The surface 18 of the arm 12 will abut the stop so placed and prevent the return of 12 in a clockwise direction beyond said abutting position. In the position shown in Fig. 5, the arm 12 is at the limit of its travel to the right or in the clockwise position. It can be seen that the movement of bell crank 65 by the stationary cam 68 will cause the maximum rotation of the collar 69, and with it the wheel 50. If, for example, a stop is placed in the hole 19 and the arm 12 cannot rotate to the right or clockwise beyond this position, then the movement of the collar 69 will only be from that point to its maximum position in the clockwise direction and, therefore, the turning of the work 42 will be a less amount than it would be if the arm 12 rotated its maximum amount, as from the position shown in Fig. 5. The screws and 8| serve to hold the indexing stop plate 16 in posi tion upon the carriage 48.

Indexing ratchet-locking means It is necessary after the indexing ratchet wheel has been positioned that the ratchet wheel and with it the work be held rigidly in position as the carriage 45 is reciprocated, and the work 42 is brought into finishing relationship with the grinding wheel 4|. This may be accomplished by means of a locking plunger 82, which is caused to project through the appropriate hole 56 of the indexing ratchet wheel 50. It is also evident that the locking plunger 82 must be withdrawn at the correct time as the indexing ratchet wheel 56 is rotated. The means for accomplishing this is located on the frame portion 83 (Fig. 1) which is a part of the cross feed carriage 4B. The locking plunger 82 is reciprocatively mounted inthe frame 83 and is spring-pressed into locking position by the spring 84, acting against the shoulder 5 of the locking plunger 82 (Figs. '7 and 9). The stud 86 is mounted on the plunger shaft of 82 and protrudes upwardly through a slot 81 of the frame 83. The purpose of this stud is to cause withdrawal of the locking plunger from operative engagement with the indexing ratchet wheel by the means about to be described.

Mounted upon the shaft GI and integral with the plate 62 is an arm 88 carrying the locking plunger retraction pawl 89, which is pivoted at 99 upon the arm 83. A spring 9|, attached to a pin 92 and to a pin 99, the latter being on the redexing' ratchet wheel 50 (rearwardly, Fig; 7). A

holding latch 95 is pivoted on I06 and is springurged in a counterclockwise direction in Fig. '7 by means of the spring 96. Spring 96 is attached to a fixed stud 91 and a stud 98 located on the holding latch 95. the stud 86 will contact the surface 99 of the latch 95 and move the pawl in a clockwise direction until the stud 88 has passed the end of the hook m9 of the holding latch 95, after which the spring 95 will cause the holding latch 95 to engage and hold the stud 86 and lock the plunger 82 in the retracted position. Further rotation of arm 89 will cause the surface ll of the retraction pawl 89 to contact a fixed stud I92, and

will rotate the retraction pawl 89 in a clockwise direction and release stud 86 therefrom so that the stud Stand locking plunger 82 are then held by the latch 95. While the rotation of arm 88 is continuing in this manner, the indexing ratchet wheel 59 is being rotated by the mechanism which has previously been described and, as the limit of the stroke of arm 89 is reached, the indexing ratchet wheel 59 has reached the desired position, and a stud or contacting surface 95 on the arm 88 will operate upon the projection I63 of the holding latch 95 and rotate it'in a clockwise direction (Fig. '7) thereby releasing the stud 86 and allowing the spring 84 to return the locking plunger 82 into a new hole 56' in the indexing ratchet wheel 59. Return movement of the reciprocating carriage 45 will allow spring I54 to return arm 88 and plate 62 in a clockwise direction to its inoperative position as the roller 94 is moved away from stationary cam 58.

Cross feed An automatic cross feed for the carriage 48 is provided so as to carry the work a pro-determined amount inwardly in the direction of the tool after a pre-determined cut has been made on each of,

As the plunger 82 is retracted,

cury tube type switch located in the holder H0. The cam surface I91 will strike the arm III and rotate the switch element so as to cause the circuit to be made as the cam IIl'I passes the switch upon rotation of the indexing ratchet wheel 55. The projection I56 may be a fiat plate directly contacting switch arm III. The switch I98 is operatively connected to a solenoid H2 (Fig. l), which has an armature H3 projecting therethrough. A shaft H4, which extends horizontally within the cross feed carriage 48 and is suitably journalled therein, may have operative connection to a fixed nut (not shown) held upon the reciprocating carriage 45 so that rotation of the shaft I I4 and screw-threaded connection between the shaft I I4 and the fixed nut located upon the reciprocating carriage 45 will serve to move the cross feed carriage 48 from right to left in accordance with the operation of the shaft H4. A hand wheel H5 is provided for manually moving the cross feed carriage 48 as desired. The automatic feed of the cross feed carriage is accomplished by means of the operation of the solenoid H2 by the switch I08. A cross feed adjustment arm H6 is pivoted at H'I upon the frame of the cross feed carriage. This arm is operatively connected to the armature H3 through the link H8. Connecting link H9 is operatively fastened within the slot I29 of arm H6 by means of bolt I 2I. A collar I22 is loosely mounted upon the shaft H4 and carries a pawl I23 (Figs. 1, and 18 to 20) which is pivoted at I24 upon the arm of the collar I22, and is urged by spring I25 into engagement with the teeth of the cross feed ratchet 52. The solenoid in Fig. l is shown in its energized position, wherein the armature H3 has been drawn to the right, having moved the cross feed adjustment arm. I I6 in a.

counter-clockwise direction. The spring I25 serves to return the arm H6 to its original position upon de-energization of the solenoid H2. In the rotation of the adjustment arm H6, the link H9 causes the collar I22 and with it the pawl I23 to rotate in a clockwise direction, the engagement of the pawl I23 with the teeth of the ratchet 52 serving to rotate the shaft H4 in a similar direction, thereby moving the cross feed carriage 48 inwardly. The manual wheel I I5 may be employed to move the cross feed carriage 49 outwardly after completion of they cycle of operation. The amount that the cross feed carriage 48 is moved inwardly and with it the work against the finishing wheel is governed by the location of the link H9 within the adjusting slot I29, and

the adjusting arm H6 may have placed thereupon index figures, as shown, showing the amount that the cross feed carriage is moved inwardly at each operation of the solenoid. It is evident that as the arm H9 is moved closer to the pivot H1, or, for example, at the point where .0005 occurs upon the arm H5, the angular movement of collar I22 will be lessthan it is when it is at the position shown in Fig. 1. As the index ratchet wheel 50 completes one revolution, the switch I58 is operated, which in turn energizes the solenoid H2, moving the armature H3.to the position. shown, which will move link H9 to the right and thereby rotate the shaft H4, as just described. The spring I25 allows the pawl I23 to move over the teeth of ratchet wheel'52 upon the return movement of the armature H3 under the influence of the spring I 25. It is also evident that a similar ratchet may be provided for the transfer switch provided so'that either'the horizontal or the vertical feed may be used to advance the work toward the finishing wheel.

Automatic clutch As has previously been stated, operation of the clutch handle 53 serves to engage the gears located within 32 with the reciprocating means for the reciprocating carriage 45. So as to provide an automatic stop for the machine upon the completion of the desired number of cuts, a means is provided whereby the clutch will be disengaged and the machine stopped. It is first necessary to describe the clutch stop mechanism.

Clutch handle 53 is pivoted at I61 upon the casing 32. Operation of the clutch handle 53 rotating the arm I21 operates the switch 54 through the link I28 to start the motor 3I. A spring I29 tends to rotate clutch handle 53 to the inoperative position. This is prevented by means of the engagement of the lug I30 (Figs. 10 to 13) located upon the pivoted arm I3I with the lug I32 located upon the arm I21. Pivoted arm I3I is integrally attached to the stop shaft assembly I 33. This shaft assembly comprises the conventional telescoping members I34 and I35. The pivoted arm I3I is therefore connected through the universal joints I36 and telescoping members I34 and I with the stop arm I 31. A spring I38 tends to rotate the shaft I39 in a counterclockwise direction (Fig. 13). The stop arm I31 is shown in the released position in Fig. 1. When it is in the operating position, the end surface I40 is adjacent to or supported by the end I4I of the arm I42 so that the stop arm I31 is in a clockwise direction from that shown in Fig. 1 (as seen in Fig. 15). When it is in this operative position, the lug I30 contacts the lug I32 of arm I21 and holds the clutch in the engaged position shown in Fig. 10. Upon release of the stop arm I31 to the position shown in Fig. 1, in a manner about to be described, the spring I38 will cause the assembly I33 to rotate in a counter-clockwise direction (Fig. 13), removing the lug I30 from its engagement with lug I32, thereby allowing the spring I29 to move the clutch mechanism in a counter-clockwise direction (Fig. 10), which will disengage the reciprocating means for reciprocating carriage 45, and also place the switch 54 in its inoperative condition and thereby stop the machine. make the device ready for the next operation, a cam I43 is located upon the arm I21 and will serve to contact roller I44 (Figs. 10 and 13) and raise the arm I3I upwardly so as to be ready for the next operation of the clutch. The inclined surface I45 upon lug I32 will facilitate the raising of the stop arm I3I as the device is again operated by moving the clutch arm 53 in a clockwise direction (Fig. 10), the spring I38 allowing the raising of the arm I3I until the lug I32 has passed, at which time the spring I38 will move the stop arm I31 in a counter-clockwise direction and place the lug I30 in operative holding relationship to lug I32. The latch I15 may be engaged with notch I16 to hold the clutch arm 53 in such a position as to operate switch 54, thereby causing the motor 3I to operate, yet not sufliciently to engage the clutch. In this position, the tool may be dressed or the proper setting ascertained.

Cycle indexing An index rack I41 is slidably mounted upon the cross feed carriage 48 by any conventional means, such as, for example, a slot I48 and studs I49 (Fig. 15). A spring I50 tends to move the So as to ill rack to its initial position or to the rear of the machine (Figs. 1 and 15), this movement being limited by the selector stop I1I, which is slidably mounted upon the cross feed carriage 48 and is positioned by means of the knob I52 and the segmental cuts in the slot I53 of the selector I5I. The knob I52 may have a shank which has a. flat portion which will allow passage of the rack to the desired point when the knob I52 is pulled outwardly, so as to allow movement of the selector I5I. When the knob I52 is moved inwardly, a cylindrical portion thereof will engage the segmental portions of slot I53 and hold the selector in the position desired. A pawl operating arm I54 is pivotally mounted at I55 (Fig. 1) on an upstanding arm of the adjustment lever II6. Upon energization of the solenoid II2, the pawl operating arm I54 will move to the left (Figs. 1 and 15) and the projection I56 thereof will engage the teeth of the selector index rack I41 and move the rack to the left. The selector retainer pawl I51, which is rotatably mounted on the stud shaft I58, has a spring I59 urging it into engagement with the teeth of the selector rack I41, which spring also urges the pawl I54 and projection I56 into engagement with the teeth of the selector rack I 41. As the pawl arm I54 moves to the left under the influence of the energization of the solenoid, the projection I56 engages the teeth of the selector rack I41 and moves the selector rack to the left with the pawl. The spring I59 allows the retaining pawl I51 to move over the teeth. Upon the completion of the stroke, the retaining pawl I51 will engage the teeth and prevent the spring I50 from returning the pawl to its initial position. As the stop stud I60 reaches the tail I6I of the clutch release arm I62, the clutch release arm IE2 is rotated in a clockwise direction, the spring I63 yielding to allow this. As the clutch release arm I62 is rotated, the upper portion MI is removed from under the end surface I40 of the arm I 31 and allows the spring I38 (Fig. 13) to move the stop arm I31 in a counterclockwise direction (Fig. 15), thereby releasing the clutch lever 53 and allowing the machine to be stopped at this point. The rotation of release arm I62 engages the projection I of the retaining pawl I51, disengaging it from the teeth of the selector rack I41. At the same time, the projection I65 also will contact the portion I10 of the operating pawl as the operating pawl has been moved to the left, which thereby removes the projection I55 from contact with the teeth of the selector rack I41. As at this point it is seen that both the retaining pawl I51 and the projection I56 are removed from engagement with the teeth of the selector rack I41, the spring I50 will return the rack to the initial position against the stop I1I of selector I5I. In this manner, the selector isready for the next operation and the machine has been stopped. The arm I31 has also been raised by the cam I 43, as previously explained, and upon the return of the selector rack I41 to its initial position, the spring I63 will rotate the clutch release arm I62 to its initial position, thus releasing the retaining pawl I51 and the operating pawl arm I54, and placing the apparatus in readiness for the next time the machine is to be operated. Upon the completion of each complete rotation of the indexing Wheel 50, which allows each of the surfaces of the work to be operated upon by the finishing wheel 4 I, the solenoid H2 is operated, thereby moving the adjustment arm II 6, rotating the shaft II4 to move cam 58, causing rotation of plate 62 about its pivot 6I. "This will cause rotation of retractionthe cross feed carriage 48 inwardly an amount in accordance with the positioning of link H9. It is evident that this inward movement will Ifiove the work inwardly against the finishing wheel 4| the predetermined amount, so that upon the complete indexing rotation of wheel 50, the desired amount will be removed from each of the faces of the work 42. The number of times which the cross feed carriage is moved inwardly will be determined by the positioning of the indexing selector device just described, and the machine will be stopped after the last mentioned operation. For example, if it is desired to remove .005 from each face of the work 42, this may be done in five steps by setting the index selector at 5 and the operating link II 9 at .001. Each reciprocation of the slotted link II6 moves the index selector rack I41 one step to the left until the. end of the travel is reached, or the point where stud I60 contacts the tail I6I of the clutch release. If the stop I5! is placed to the extreme right so that the knob I52 engages the location marked I0, it is evident that with the selector rack I41 shown that ten steps will be necessary before the stud I60 actuates the clutch release arm I62 and stops the machine. It is also evident that if only one out is desired that the index stop may be set at l, at which time, after the first complete rotation of the index ratchet wheel I50, the operation of switch I08 will operate the solenoid H2 and the pawl I54, which will thereupon move stud I60 immediately against the tail I6! and stop the machine.

Summary of operation work may be checked by means of the usual gauges, such as, for example, a dial gauge mounted in a suitable holder, the holder being designed specifically for the machine. The selector mechanism is then set so as to take the desired number of cuts and the desired amount during each 5';

cutting upon each face of the work 42. For example, if it is desired to take .005 off of each face in five cuts, the link H9 is placed at .001 of the cross feed adjusting arm H6. The selector stop I5I is placed so that the knob I52 is in the position marked 5, so that the machine will take five cuts on each face of .001 at each cut. The correct index ratchet wheel 50 is selected, and a stop placed in one of the holes 11 of the stop plate I6 so that the operation of the index ratchet wheel 50 will give the proper travel of the work after each reciprocation of the carriage 45 so as to bring each face of the work successively into contact with the finishing wheel 4| after each reciprocation of the carriage. The clutch handle 53 is then moved into operating position, which causes switch 54 to start the motor 3|. The clutch will also engage the driving means for the reciprocating carriage 45 and cause reciprocation thereof. As the carriage moves inwardly to the correct extent of its travel, the work 42 will be brought into grinding or finishing relationship to wheel 4| and then will return. Upon the return towards the rear of the machine, the cam roller 64 will contact fixed pawl 89 to retract locking plunger 82 from its position within one of the holes 56 'of the ratchet wheel 50, the hook '94 of retraction pawl 89 acting upon. the stud 86 of locking plunger 82. the stud 86 is withdrawn, it will hit the end of the surface 99 of holding latch 95, moving it outward against the tension of the spring 96, the latch 95 then snapping back into position so as to hold the stud 86. As the arm=88 continues its rotation, the surface ml of retraction pawl 89 will strike fixed stud I02 and thereby release the stud 86 from engagement with the hook 94, allowing the-stud 86 to be heldby the holding latch 95 only. While this has been occurring, the cam 63 located on the arm 62 has been operating upon roller 61 of the bell crank 65. op-1 eration of the bell crank 65 pulls link I3, cause ing rotation of the collar 69, and therewith the ratchet wheel through the pawl 10, the location of the stop 11 in stopplate I6 serving as a step acting against the surface 18 of arm I2 and limiting the movement of the collar 69. Up-

. on the completion of this movement, the further rotation of the arm 88 accompanying it will cause a portion of I03 to act upon the extending arm of holding latch 95, thereby releasing the stud 85 and allowing the locking plunger to enter .a

1 new hole 56 in the ratchet wheel 50 so that the work has been given the desired angular movement so as to present a new surface into readiness for being operated upon by the finishing wheel 4I upon the reciprocation of the carriage 45. These operations continue until the first surface operated upon has again arrived into the position in readiness for another movement towards the finishing wheel. This means that a complete revolution of the ratchet wheel 50 has occurred so, therefore, the cam I0'Ioperates' the switch I08, causing an energization of solenoid H2 with resultant movement of adjustment arm H6 through link IIB. Motion of this is transmitted through link II9 to the collar I22 and through the pawl I23 to the horizontal feed ratchet wheel 52, which moves the cross feed carriage 48 inwardly towards the finishing wheel the amount determined by the setting of link H9 within the slot I20. The movement of adjusting arm II6 causes the pawl operating arm I54 to move to the left, moving the index rack I471 one step through the projection I56 on pawl operating arm I54 and the teeth of the index rack I47, the retaining pawl I51 sliding over the stops of the teeth and engaging the next tooth. At the point when the clutch handle 53 was operated, the arm I31 had been raised by the cam I43 or manually, so that the stop arm I37 overlies the end I4I of the clutch release arm I62. As the last out is reached, the next energization of solenoid II2 will cause operation of the pawl operating arm I54, carrying the index rack I47 another step tothe left (Fig. 15) to bring stop stud I against the tail of the clutch release arm I62, causing it to rotate, thereby allowing I3'I to move in a counterclockwise direction from the position shown in Fig. 15 to that shown in Fig. 1, which will release the clutch and stop the device. While this has occurred, the pawl operating arm I54 and retaining pawl I5'I have been both disengaged from the teeth of index rack I41 at the same time, so that the spring I50 will return index rack I4I to its initial position.

It can be seen therefore that a machine and index means therefor have been provided by this invention that will facilitate the finishing of multiple surface tools and will do it more efii ciently. The invention is not to be considered as limited to the specific construction shown and described by way of illustration, since it extends to all equivalent construction falling within the scope of the appended claims, which claims are to be broadly construed.

What is claimed is:

1. In a universal machine for operating upon each of the several surfaces of a multiple surface rotary tool, the combination comprising: an adjustable indexing means to rotate the tool a predetermined amount readily adjustable in accordance with the number of tool surfaces, so that a new surface is in position to be operated upon after the preceding surface has been operated upon; indexing means to move the tool after a complete revolution thereof, so that a further predetermined operation will take place upon each of the several surfaces as the tool is rotated by the first mentioned indexing means; and an adjustable indexing means to stop the machine only after an optionally selectable predetermined number of complete revolutions of the tool.

2. In a universal machine for operating upon each of the several surfaces of a multiple surface rotary tool, the combination comprising: adjustable indexing means including a ratchet wheel to rotate the tool a predetermined amount after each operation upon a surface, so that a new surface is in position to be operated upon, a pawl and an oscillatable carrier to rotate said wheel, a fixed plate having an adjustable stop to limit the oscillation of said carrier in accordance with the number of surfaces to be operated upon; a cam to oscillate said carrier, said cam being arranged to allow the limitation of carrier oscillation; indexing means to move the tool after a complete revolution thereof, so that a further predetermined operation will take place on each of the several surfaces as the tool is rotated by the first mentioned indexing means; and an indexing means to stop the machine after a predetermined number of complete revolutions of the tool.

3. In a universal machine for operating upon each of the several surfaces of a multiple surface rotary tool, the combination comprising: an adjustable indexing means to rotate the tool a predetermined amount readily adjustable in accordance with the number of tool surfaces, so that a new surface is in position to be operated upon after the preceding surface has been operated upon; adjustable indexing means to move the tool laterally after a complete revolution thereof, so that a further predetermined operation will take place upon each of the several surfaces as the tool is rotated by the first mentioned indexing means, said means having an arm whose effective length may be changed to vary the amount the tool is moved laterally; and an adjustable indexing means to stop the machine after an optionally selectable predetermined number of complete revolutions of the tool.

4. In a machine for operating upon each of the several surfaces of a multiple surface rotary tool, the combination comprising: indexing means to rotate the tool a predetermined amount after each operation upon a surface, so that a new surface is in position to be operated upon; indexing means to move the tool after a complete revolution thereof so that a further predetermined operation will take place upon each of the several surfaces as the tool is rotated by the first mentioned indexing means, said second indexing means being operable by a solenoid energized by the first indexing means after a complete revolution of the tool; and an indexing means to stop the machine after a predetermined number of complete revolutions of the tool.

5. In a machine for operating upon each of the several surfaces of a multiple surface rotary tool, the combination comprising: a switch and clutch operator and a yieldable latch means to hold the switch and clutch in operating position after the machine is started; indexing means to rotate the tool a predetermined amount after each operation upon a surface, so that a new surface is in position to be operated upon; indexing means to move the tool after a complete revolution thereof, so that a further predetermined operation will take place upon each of the several surfaces as the tool is rotated by the first mentioned indexing means; and an indexing means to disengage said switch and clutch to stop the machine after a predetermined number of complete revolutions of the tool, said stop means releasing the latch which yieldably holds the switch and clutch means in operating position.

6. In a machine for operating upon each of the several surfaces of a multiple surface rotary tool, the combination comprising: a switch and clutch operator and a yieldable latch means to hold the switch and clutch in operating position after the machine is started; indexing means to rotate the tool a predetermined amount after each operation upon a surface so that a new surface is in position to be operated upon; indexing means to move the tool after a complete revolution thereof so that a further predetermined operation will take place upon each of the several surfaces as'the tool is rotated by the first mentioned indexing means; and an indexing means to disengage said switch and clutch to stop the machine after a predetermined number of complete revolutions of the tool, said stop means releasing the latch, which yieldably holds the switch and clutch means in operating position; and means to return said indexing means to its initial position in readiness for the next operation.

7. In a machine for operating upon each of the several surfaces of a multiple surface rotary tool, the combination comprising: adjustable indexing means to rotate the tool a predetermined amount after each operation upon a surface so that a new surface is in position to be operated upon, said means having an adjustable stop to vary the angular rotation of the tool after each operation, in accordance with the number of surfaces to be operated upon; adjustable indexing means to move the tool laterally after a complete revolution thereof so that a further predetermined operation will take place upon each of the several surfaces as the tool is rotated by the first mentioned indexing means, said means having an arm whose effective length may be changed to vary the amount the tool is moved laterally: and an indexing means to stop the machine after a predetermined number of complete revolutions of the tool.

8. In a machine for operating upon each of the several surfaces of a multiple surface rotary tool. the combination comprising: adjustable indexing means to rotate the tool a predetermined amount mars es after each operation upon a surface so that'a' new surface is in position to be operated upon, said means having an adjustable stop to vary the angular rotation of th tool after each operation, in accordance with the number of surfaces to be operated upon; adjustable indexing meansto move the tool laterally after a complete revolution thereof so that a further predetermined operation will take place upon each of the several surfaces as the tool is rotated by the first mentioned indexing means, said means having an arm whose effective length may be changed to vary the amount the tool is moved laterally; and an adjustable indexing means to stop the machine after a predetermined number of complete revolutions of the tool, said means having a stop that may be set so that the number of operations on each surface may be changed.

9. In a machine for operating upon each of the several surfaces of a multiple surface rotary tool, the combination comprising: adjustable indexing means to rotate the tool a predetermined amount after each operation upon a surface so that a new surface is in position to be operated upon, said having an adjustable stop to vary the angular rotation of the tool after each operation, in accordance with the number of surfaces to be operated upon; indexing means to move the tool after a complete revolution thereof so that a further predetermined operation will take place on each of the several surfaces as the tool is rotated by the first mentioned indexing means; and an adjustable indexing means to stop the machine after a predetermined number of complete revolutions of the tool, said means having a stop that may be set so that the number of operations on each surface may be changed.

10. In a machine for operating upon each of the several surfaces of a multiple surface rotary tool, the combination comprising: indexing means to rotate the tool a predetermined amount after each operation upon a surface so that a new surface is in position to be operated upon; adjustable indexing means to move the tool laterally after a complete revolution thereof so that a further predetermined operation will take place upon each of the several surfaces as the tool is rotated by the first mentioned indexingmeans, said means having an arm whose effective length may be changed to vary the amount the tool is moved laterally; and an adjustable indexing means to stop the machine after a predetermined number of complete revolutions of the tool, said means having a stop that may be set so that the number of operations on each surface may be changed.

11. In a machine for operating upon each of the several surfaces of a multiple surface rotary tool, the combination comprising: adjustable indexing means to rotate the tool a predetermined amount after each operation upon a surface so that a new surface is in position to be operated upon, said means including a wheel having serrations thereon, said wheel being operatively connected to said tool, a pawl adapted to engage said serrated wheel, a carrier for said pawl, said carrier being movable after each operation upon a surface of the tool, an adjustable stop to limit .the movement of the carrier in one direction so that the travel of the carrier may be adjusted to bring the next surface of the tool into proper position for the next operation thereon; indexing means to'move the tool after a complete revolution thereof,so that a further predetermined operation will take place on each of the several surfaces as the tool is rotated by the first-mentioned indexin means; and an indexing means to stop the machine after a predetermined number of complete revolutions of the tool.

12. In a machine for operating upon each of the several surfaces of a multiple surface rotary tool, the combination comprising: adjustable indexing means to rotate the tool a predetermined amount after each operation upon a surface so that a new surface is in position to be operated upon, said means including a wheel having serrations thereon, said wheel being operatively connected to said tool, a pawl adapted to engage said wheel, a rotatable carrier for said pawl, said carrier being oscillatable a predetermined amount after each operation upon a surface of the tool, an adjustable stop adapted to limit the rotation of the carrier so that the angular movement of the carrier may be made such as to bring the next surface of the tool into proper position for the next operation thereon; indexing means to move the tool after a complete revolution thereof, so that a further predetermined operation will take place on each of the several surfaces as the tool is rotated by the first-mentioned indexing means; and an indexing means to stop the machine after a predetermined number of complete revolutions of the tool.

13. In a machine for operating upon, each of the several surfaces of a multiple surface rotary tool, the combination comprising: adjustable indexing means to rotate the tool a predetermined amount after each operation upon a surface so that a new surface is in position to be operated upon, said means including a ratchet wheel operatively connected to said tool, a pawl adapted to engage said ratchet wheel, an oscillatable carrier for said pawl rotatable a predetermined angular amount after each operation upon a surface of the tool, a plate having a plurality of holes therein, a stop adapted to be placed in any of said holes, said carrier having a portion adapted to abut the stop thus placed so that the oscillation of the carrier may be limited so as to bring the next surface of the tool into proper position for the'next operation thereon; indexing means to move the too1 after a complete revolution thereof, so that a further predetermined operation will take place on each of the several surfaces as the tool is rotated by the first-mentioned indexing means; and an indexing means to stop the machine after a predetermined number of complete revolutions of the tool.

14. In a universal machine for operating on multiple surface rotary work, a rotatable work holder, indexing means to rotate the work holder, locking means for holding the indexing means including a plunger adapted to engage said indexing means, said plunger having a projection thereon, an oscillatable arm to withdraw said plunger from the indexing means 'by engaging said projection, an auxiliary means adapted to engage said projection after the plunger has been withdrawn, means to release said first-mentioned oscillatable arm so that the auxiliary means will hold the plunger by engagement with said projection, and means to release said auxiliary means so that the plunger again can engage the indexing means after the work holder has been indexed.

15. In a universal machine for operating on multiple surface rotary work, a rotatable work holder, adjustable indexing means to rotate the work holder a predetermined amount in accordance with the number of surfaces to be operated upon after each operation on thework, locking means for the work holder while the work is being operated on, oscillatable rotatable indexing operator means for operating the indexing means and having an unlocking means associated therewith to disengage said locking means, an auxiliary holding means for the locking means, means to release said unlocking means so that the locking means is held by the auxiliary holding means and the unlocking means may continue to the end of its oscillation with the indexing operator, and means associated with said unlocking means to release said auxiliary holding means so that the locking means again can hold the work holder.

16. In a machine for operating upon each of the several surfaces of a multiple surface rotary tool, the combination comprising adjustable oscillatable indexing means to rotate the tool a predetermined amount after each operation upon a surface so that a new surface is in position to be operated upon, said means including a wheel having serrations thereon, said wheel being operatively connected to said tool; a pawl adapted to engage said serrated wheel; an oscillatable carrier for said pawl, said carrier being movable after each operation upon a surface of the tool; an adjustable stop to limit the movement of the carrier in one direction, so that the travel of the carrier may be adjusted to bring the next surface of the tool into proper position for the next operation thereon; locking means for the indexing means; unlocking means to disengage said locking means from the indexing means, said unlocking mean being oscillatable with the carrier; an auxiliary holding means for the locking means; means to release said unlocking means so that the locking means is held by the auxiliary holding means and the unlocking means may continue to the end of its oscillation with the indexing means; means to release said auxiliary holding means so that the locking means again can engage the indexing means after the tool has been rotated a predetermined amount.

17. In a machine for operating upon each of the several surfaces of a multiple surface rotary tool, the combination comprising adjustable indexing means to rotate the tool a predetermined amount after each operation upon a surface so that a new surface is in position to be operated upon, said means including a wheel having serrations thereon, said wheel being operatively connected to said tool; a pawl adapted to engage said serrated wheel; an oscillatable carrier for said pawl, said carrier being movable after each operation upon a surface of the tool; an adjustable stop to limit the movement of the carrier in one direction, so that the travel of the carrier may be adjusted to bring the next surface of the tool into proper position for the next operation thereon; locking means for the indexing means; unlocking means to disengage said locking means from the indexing means, said unlocking means being oscillatable with the carrier; an auxiliary holding means for the locking means; means to release said unlocking means so that the locking mean is held by the auxiliary holding means and the unlocking means may continue to the end of its oscillation with the index operator; means to release said auxiliary holding means so that the locking means can again engage the indexing means after the tool has been rotated a predetermined amount; indexing means to move the tool after a complete revolution thereof so that a further predetermined operation will take place on each of the several surfaces as the tool is rotated by the first-mentioned indexing means; and an indexing means to stop the machine after a predetermined number of complete revolutions of the tool.

18. In a machine for operating on each of several surfaces of a multiple surface tool an optionally selectable number of operations on all the surfaces thereof: control means for said machine having an operating position and a machine-stopping position; a latch and a retaining arm for holding said control means in operating position; a reciprocable step-by-step operating means adapted to move said arm from latch retaining position when the step-by-step operating means is at one limit of it reciprocation, said step-by-step operating means being movable one step after each time the machine has performed one operation on each of the several surfaces; means to move said control means to a machine-stopping position when the latch is released by said arm; and means to adjust the other limit of reciprocation of said step-by-step operating means so that the number of steps occurring before the machine is stopped may be optionally selected.

19. In a machine for operating on each of several surfaces of a multiple surface tool a predetermined number of operations on all the surfaces thereof: an adjustable machine-stopping means including a tripping means for stopping the machine; a step-by-step reciprocable tripping means operator; a reciprocating lever having a pawl to engage said operator; means to reciprocate said lever after each time the machine has operated on all the surfaces of the tool; means integral with said tripping means operator to actuate the tripping mean and stop the machine when the operator is moved the last step at the final limit of its reciprocation; and means to adjust the other limit of reciprocation so that the number of steps moved by the trip operator before the other limit is reached may be optionally selected.

20. In a machine for operating on each of several surfaces of a multiple surface tool an optionally selectable number of operation on all the surfaces thereof: an adjustable machinestopping means including a tripping means for stopping the machine; a step-by-step reciprocable tripping means operator; a reciprocating lever having a pawl thereon to move said operator in one direction; means to reciprocate said lever after each time the machine has operated on all the surfaces of the tool, the pawl engaging said operator and moving the same one step with each reciprocation; means integral with said operator to actuate the tripping means and stop the machine when the operator is moved the last step at one limit of its reciprocation; means to adjust the other limit of reciprocation of said operator; resilient means to urge the operator toward said adjustable limit of reciprocation; a retaining pawl to hold said operator; and means to render said retaining pawl and reciprocating lever pawl ineffective as the last step is reached so that said operator will be returned to the initial position by said resilient means.

ERIC W. PETERSON. 

